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RE: GAS Saito - 2/14/2012 2:26 PM   
spaceworm


 

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quote:

ORIGINAL: WindGap

Would it be better to get the the fg-17 with it's improvements or just get the fg-20? at $100 diff the improvements should be quite significant. I just wonder if they'll upgrade the next run of fg-20's to incorporate the improvements in the fg17


How about upgrading the FG-20 yourself with a $60 RCexl, get the bigger engine and save $40? Or, or there other differences? Thanks.


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RE: GAS Saito - 2/14/2012 3:00 PM   
serious power


 

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quote:

ORIGINAL: w8ye

Using the check valve builds up a lot of pressure - you will also need to run a regulator such as a Cline.

The FG series saito engines do not have a muffler pressure outlet on them



Hi,
Thanks.
I'm not familiar , what's a 'cline' ? - a link will do.

Brian

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RE: GAS Saito - 2/14/2012 3:50 PM   
BadAzzMaxx


 

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RE: GAS Saito - 2/14/2012 5:37 PM   
serious power


 

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Status: offline 		Hi,
Thanks.Do you know are these good with both gas and glow ??

Brian

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RE: GAS Saito - 2/14/2012 5:51 PM   
BadAzzMaxx


 

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Status: offline 		Gas engines do not need them, A good gas engine Walbro type carb will pull fuel 3' straight up.

I used them for years on glow engines and they work great, All they are is a regulator out of a Walbro carb that controls the amount of fuel to the engine with pressure to the fuel tank, Plus you have to wrap your fuel tank with a thread type tape or the tank will bust from the pressure.

Milton

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RE: GAS Saito - 2/14/2012 6:46 PM   
serious power


 

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Status: offline 		Hi,
It's for a Saito FG series - no walbro there.
It's for a long duration flight - 2 hours - multiple tanks in series.

Brian

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RE: GAS Saito - 2/14/2012 6:47 PM   
Didg


 

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RE: GAS Saito - 2/14/2012 7:13 PM   
serious power


 

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Status: offline 		Hi,
I've just rec'd a reply from Cline in response to this.
They say that they are used with both gas and glow.

Brian


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RE: GAS Saito - 2/14/2012 7:46 PM   
BadAzzMaxx


 

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quote:

ORIGINAL: serious power

Hi,
I've just rec'd a reply from Cline in response to this.
They say that they are used with both gas and glow.

Brian



Good sells pitch.
Do not know why you would need one on a gas engine with Walbro style carb. ????

Milton

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RE: GAS Saito - 2/14/2012 8:00 PM   
w8ye



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Status: offline 		The FG14, 17, & 20 do not have a regulator in the pumper carb. Instead, they have a weak pump that is run by intake pulses. A poor design in my opinion but they were trying to save weight and space.

When you add increased tank pressure that goes up with increased rpm but does not decrease with reduced rpm such as muffler pressure held back by a check valve, you will have fuel metering problems and a resulting rich mixture when you reduce the throttle. Therefore the need for the regulator.


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RE: GAS Saito - 2/14/2012 8:03 PM   
w8ye



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Status: offline 		Here is a good typical source of replacement RCEXL ignitions for your Saito FG series engines with the original Saito inductive pick up ignitions.

http://www.rcextremepower.net/ignitions.html


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RE: GAS Saito - 2/14/2012 10:14 PM   
serious power


 

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quote:

ORIGINAL: w8ye

The FG14, 17, & 20 do not have a regulator in the pumper carb. Instead, they have a weak pump that is run by intake pulses. A poor design in my opinion but they were trying to save weight and space.

When you add increased tank pressure that goes up with increased rpm but does not decrease with reduced rpm such as muffler pressure held back by a check valve, you will have fuel metering problems and a resulting rich mixture when you reduce the throttle. Therefore the need for the regulator.



Hi,
Thanks.
It's sometimes difficult to get the right message/understanding across on these threads.

BTW; I have run 60 to 90 size 4 strokes and 60 2 strokes with retained exhaust pressure for years , but these were glow.
I had noticed that there was no pressure nipple on the FG/gas mufflers.

For this flight we will have a header tank,main tank and wing tanks or a pair of 'saddle bag' tanks, if we can't do wing tanks.

Brian

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RE: GAS Saito - 3/5/2012 8:26 PM   
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Status: offline 		Hi,
I have just run the FG17 for 4 hours at mid rpm range on the bench - mounted upright.
While giving it a once over I noticed that the rockers were very very dry.
When I move it to the model it will be inverted.
It will have to run for long periods without rolling - it will be in a bleriot xi .

Will the bearings and con rod get enough lube ????

Brian

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RE: GAS Saito - 3/5/2012 8:40 PM   
BadAzzMaxx


 

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Status: offline 		That is one of the things I have seen posted by others, the exhaust valve stick sometimes and have to be lubed.

I have seen people post after a flying day they remove the cover and put a few drops of oil on the exhaust valve but do not know if they are running them right side up or inverted.

Milton

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RE: GAS Saito - 10/6/2012 3:08 AM   
Greenfuelboy


 

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Status: offline 		 Saito FG36 ignition question:


 I want to I cut the connectors off the hall sensor and ignition. I would like to replace them with servo connectors. Will the stock Saito FG36 ignition work with a RCEXL Mini Tachometer. I have cut the connectors off my CH ignition before and it worked with RCEXL a Tachometer. I am 99% sure it will work I just want some input.

Thank you
GFB


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RE: GAS Saito - 10/6/2012 3:59 AM   
w8ye



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Status: offline 		The big round Saito ignition timing sensor or non of its wies will not work with anything RCEXL or CH.  They work on a different principle


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RE: GAS Saito - 10/6/2012 4:52 AM   
Greenfuelboy


 

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Status: offline 		My ch ignition works with a RCEXL tachometer. I thought the FG36 ignition would work if I changed the connectors.   

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RE: GAS Saito - 10/6/2012 4:55 AM   
Greenfuelboy


 

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Status: offline 		I have a BME 50cc classic engine that uses a CH ignition. I know it works it is in my plane. I just thought some one tried it by now. 

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RE: GAS Saito - 10/6/2012 11:33 AM   
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Status: offline 		Did all the fg36's have a brass insert for the valve seats or did that get changed along the way? don't know how others do it but i pull the rocker covers and dribble some atf fluid down there just in case they really do run dry,any thoughts?

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RE: GAS Saito - 10/6/2012 12:59 PM   
w8ye



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Status: offline 		To check if you have brass valve seats, you do not need to remove the cylinder.

The ones with bronze seats, the brassy metal goes all up through the valve pocket.

You can remove the intake or exhaust and see the brass look?


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RE: GAS Saito - 10/20/2012 2:39 PM   
kwik



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Status: offline 		No, it will not work. I have the FG-36 and the FG-57.

The RCExl tach works fine on the FG-57. It will not work on the FG-36.

There is only 2 wires on the FG-36.

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RE: GAS Saito - 10/29/2012 5:42 AM   
akouzmit



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Status: offline 		I have a question regarding SAITO FG-36.

I run my new FG36 for 1.5+1.5=3hours.
Mostly idling, but also short bursts of high RPM at the second 1.5 hours.
In total ~36cc tank of 87gas + Evolution oil recommended for this engine=>1:17.
Prop: oar: 18x8.
At the end of te second 1.5 hour I tuned niddles and look like I got stable low RPM as 1830 and my high RPM reached 7500.

Q#1: I expected high RPM to be at 8500 point, but I wasn't able to get it with 18x8 prop and 87-gas.
What I can explore here in order to get higher RPM?

Q#2: After ~2 hours of braking in I can hear some strange noise (while engine is off) when manually rotating prop back and forward quickly.
Sound like a lost metal ball running inside crankcase.
The engine still opperate OK, but I am wondering about that sound.
You can only hear this sound when moving prop manually back and forward by ~45 - ~90 degree.

Anybody experiencing such sound on fg36 ?

Thank you for your input.

It is my first experience with 4 stroke engine.

I also have 2 stroke OS FG-33, wich is trouble free in every way!

Andrei K.

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RE: GAS Saito - 10/29/2012 6:02 AM   
w8ye



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Status: offline 		The "Click" you hear in a FG-36 is the cam shaft gear mesh slack changing position from being pushed by the crankshaft to pushing the crankshaft because of the valve springs.


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RE: GAS Saito - 11/6/2012 5:27 AM   
kochj


 

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Status: offline 		Wyne....

I have a FG36.... never run....
Would you run it to see if any issues, or just replace the ignition, and throw a Zema 4stroke carb on it, and call it done...and ready to hual mail??

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RE: GAS Saito - 11/6/2012 1:29 PM   
w8ye



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Status: offline 		Try it as it came from the factory at first. You may find it satisfactory?

The four stroke carbs are a little hard to come by. The supply of Walbro carbs that were used on the Ryobi four strokes has dried up. There's a Zama model out here but ZI don't remember the number right now.

The Walbro that comes on the FG-36 would be OK if you could get parts for it.


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